RELATIONSHIPS BETWEEN FRUIT BODY COMPOSIT IONS AND SUBSTRATES IN BUNASHIMEJI [HYPSIZIGUS MARMOREUS (PECK) BIGELOW], NAMEKO [PHOLIOTA NAMEKO(ITO,T.) S ITO IMAI IN IMAI] AND ENOKITAKE [FLAMMULINA VELUTIPES (CURT, FR) SING] MUSHROOMS CULTIVATED ON SAWDUST SUBSTRATE BEDS

Ten samples of Bunashimeji [Hypsizigus marmoreus (Peck) Bigelow], four teen samples of Nameko [Pholiota nameko (T. Ito) S. Ito et Imai in Ima i] and eight samples of Enokitake [Flammulina velutipes (Curt.: Fr.) S ing.] mushroom cultivated on sawdust substrate beds were obtained toge ther with their substrate beds, which were all of distinct origins. By analyzing proximate compositions and mineral contents in both these m ushrooms and their substrate beds, effects of the sawdust substrate co mposition on the mushroom composition were examined. In Bunashimeji, N ameko and Enokitake mushrooms, the nitrogen content in their fruit bod y was not significantly related to that in the substrate. In Bunashime ji mushroom, concentration of minerals to the fruit body from the subs trate was found in K (11.6 times), Na (9.73 times), Zn (1.81 times), C d (4.30 times) and Hg (1.80 times), but a significant correlation betw een them was found only in Na. Fe from the substrate was not concentra ted in the fruit body, however, a significant correlation between the fruit body and its substrate was observed. In Nameko mushroom, concent ration of minerals to the fruit body from the substrate was found in K (5.9 times), Na (2.31 times), Mg (1.52 times), P (4.52 times), Cu (1. 69 times), Zn (4.02 times) and Cd (3.23 times). Ca from substrate was not concentrated in the fruit body, however, a significant correlation between the fruit body and its substrate was observed. In Enokitake m ushroom, concentration of minerals from the substrate to the fruit bod y was found in K (3.13 times), Zn (1.76 times), Cd (1.89 times) and Hg (1.88 times). Cu was not concentrated in the fruit body from the subs trate, however a significant correlation between the fruit body and it s substrate was observed.